I can’t be the only one in the community longing after a low noise, stereo mixer to come from two of my DAC’s into my headphone amplifier. If anyone has any ideas, please share them. I have tried the Hart Just Mixer (hot garbage the switch mode power from its voltage regulator IC is horrendously loud), so far. After that experience I’m going to wait on what I purchase, Until I hear from someone that has a recommendation, as I obviously can’t be trusted making purchase decisions. 
What I’m looking for:
Two stereo channels. I would prefer to stay away from mono, just because in my experience hard panning adds unequal attenuation, which can be compensated for but it changes from track to track. Unless I were to go for a high dollar summing mixer.
Has anyone found a solution for this esoteric problem? It doesn’t need to be pretty, just workable.